Implementing Single Line Asynchronous Dual Watchdog Communication for Esd Immunity

1. A dual watchdog communication circuit for implementing single line asynchronous dual watchdog communication for electrostatic discharge (ESD) noise immunity comprising: a source transceiver module; a sink transceiver module; said sink transceiver module being connected by a single line to said source transceiver module; said single line carrying communications between the source transceiver module and the sink transceiver module; each of said source transceiver module and said sink transceiver module using a coded pulse to implement the single line asynchronous dual watchdog communication for providing ESD noise immunity; and said source transceiver module including a transmitter, a first receiver coupled to the single line; a timer, a second receiver receiving an input to the source transceiver module; and a control block coupled to said transmitter, said timer, and said second receiver; said control block for controlling operation of said source transceiver module.

2. A dual watchdog communication circuit for implementing single line asynchronous dual watchdog communication for electrostatic discharge (ESD) noise immunity comprising: a source transceiver module; a sink transceiver module; said sink transceiver module being connected by a single line to said source transceiver module; said single line carrying communications between the source transceiver module and the sink transceiver module; each of said source transceiver module and said sink transceiver module using a coded pulse to implement the single line asynchronous dual watchdog communication for providing ESD noise immunity; and said sink transceiver module including a transmitter, a receiver coupled to the single line, a timer, and a second transmitter providing an output from the sink transceiver module.

3. The dual watchdog communication circuit as recited in claim 2 wherein said sink transceiver module includes a control block coupled to said receiver, said timer and said second transmitter.

4. The dual watchdog communication circuit as recited in claim 2 wherein said source transceiver module responsive to receiving a valid level output from said sink transceiver module, said source transceiver module outputs a sink coded pulse to said sink transceiver module, and starts a source timer.

5. The dual watchdog communication circuit as recited in claim 4 wherein said sink transceiver module responsive to receiving said valid sink coded pulse, said sink transceiver module starts a sink timer and outputs a source coded pulse to said source transceiver module.

6. The dual watchdog communication circuit as recited in claim 5 wherein said source transceiver module responsive to receiving said valid source coded pulse, said source transceiver module stops sending to said sink transceiver module.

7. The dual watchdog communication circuit as recited in claim 6 wherein said sink transceiver module generates and outputs said valid level output to said source transceiver module responsive to a sink timer time out.

8. The dual watchdog communication circuit as recited in claim 4 wherein said source transceiver module responsive to a time out of said source timer without receiving valid source coded pulse, said source transceiver module outputs said sink coded pulse to said sink transceiver module, and starts said source timer, and continues until a valid source coded pulse is received.

9. The method for implementing single line asynchronous dual watchdog communication for electrostatic discharge (ESD) noise immunity comprising the steps of: providing a source transceiver module; providing a sink transceiver module; connecting said sink transceiver module by a single line to said source transceiver module; said single line carrying communications between the source transceiver module and the sink transceiver module; and using a coded pulse with each of said source transceiver module and said sink transceiver module to implement the single line asynchronous dual watchdog communication for providing ESD noise immunity; and said source transceiver module responsive to receiving a valid level output from said sink transceiver module, outputs a sink coded pulse to said sink transceiver module, and starts a source timer.

10. The method for implementing single line asynchronous dual watchdog communication for electrostatic discharge (ESD) noise immunity as recited in claim 9 wherein said sink transceiver module responsive to receiving said valid sink coded pulse, starts a sink timer and outputs a source coded pulse to said source transceiver module.

11. The method for implementing single line asynchronous dual watchdog communication for electrostatic discharge (ESD) noise immunity as recited in claim 10 wherein said source transceiver module responsive to receiving said valid source coded pulse, said source transceiver module stops sending to said sink transceiver module, and wherein said sink transceiver module generates and outputs said valid level output to said source transceiver module responsive to a sink timer time out.

12. The method for implementing single line asynchronous dual watchdog communication for electrostatic discharge (ESD) noise immunity as recited in claim 10 wherein said source transceiver module responsive to a time out of said source timer without receiving valid source coded pulse, said source transceiver module outputs said sink coded pulse to said sink transceiver module, and starts said source timer, and continues until a valid source coded pulse is received.

13. A design structure tangibly embodied in a non-transitory machine readable medium used in a design process, the design structure comprising: a dual watchdog communication circuit tangibly embodied in the non-transitory machine readable medium used in the design process, said dual watchdog communication circuit for implementing single line asynchronous dual watchdog communication for electrostatic discharge (ESD) noise immunity; said dual watchdog communication circuit includes a source transceiver module; a sink transceiver module; said sink transceiver module being connected by a single line to said source transceiver module; said single line carrying communications between the source transceiver module and the sink transceiver module; and each of said source transceiver module and said sink transceiver module using a coded pulse to implement the single line asynchronous dual watchdog communication for providing ESD noise immunity; said source transceiver module including a transmitter, a first receiver coupled to the single line; a timer, a second receiver receiving an input to the source transceiver module; and a control block coupled to said transmitter, said timer, and said second receiver; said control block for controlling operation of said source transceiver module; wherein the design structure, when read and used in the manufacture of semiconductor chips produces a pair of semiconductor chips comprising said dual watchdog communication circuit.

14. The design structure of claim 13 , wherein the design structure comprises a netlist, which describes said dual watchdog communication circuit.

15. The design structure of claim 13 , wherein the design structure includes at least one of test data files, characterization data, verification data, or design specifications.